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・ Porcupine Hills
・ Porcupine Hills Formation
・ Porcupine Lake (Nova Scotia)
・ Porcupine Meadows Provincial Park
・ Porcupine mine
・ Porcupine Mountains
・ Porcupine Plain
・ Porcupine Plain Airport
・ Porcupine Provincial Forest (Manitoba)
・ Porcupine ray
・ Porcupine Rim Trail
・ Porcupine River
・ Porcupine River (British Columbia)
・ Porcupine River (disambiguation)
・ Porcupine River (Ontario)
Porcupine river stingray
・ Porcupine Seabight
・ Porcupine Tree
・ Porcupine Tree discography
・ Porcupine, Alaska
・ Porcupine, North Dakota
・ Porcupine, South Dakota
・ Porcupine, Wisconsin
・ Porcupine-class post ship
・ Porcupinefish
・ Porcupines Are Born Without Bristles
・ Porcus
・ Porczyny
・ Porcăreasa River
・ Porcăreața River


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Porcupine river stingray : ウィキペディア英語版
Porcupine river stingray

The porcupine river stingray, ''Potamotrygon hystrix'', is a species of river stingray in the family Potamotrygonidae, the type of the ''Potamotrygon'' genus. It is found in the basins of the Paraná and Paraguay River basins in South America.
==Appearance==

Almost circular in shape, it grows up to in diameter and in length, including the tail. The upper surface is covered with denticles (sharp tooth-like scales). The coloration is light brownish with mottled patterns on the dorso, and pink on the ventral side. As with all stingrays, the mouth and gill openings are on the underside, and the eyes and gills exits are on the dorsal side.

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
ウィキペディアで「Porcupine river stingray」の詳細全文を読む



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